Interesting for me is a top reason is "it's too expensive" and that's also my personal experience, why people go buy shitcoins like Ripple instead of BTC, they don't get you can buy fractions of, and unit price feels too expensive for them.
Also... outside the Americas, more women than men think they know more about Bitcoin. Pretty unexpected.
Same here, when I was a newbie I also think that btc is too expensive that is why I didn't buy it but later on I figured out that btc can be divided in smaller portions and you can also buy it this way. I think this was still included on the knowledge part, the op discussing about.
There are also people that knows that they can buy btc in factions but they still think that they can earn more on a much lighter coin because they can buy millions of it at a much cheaper cost. Btc/cryptos are not a secret anymore and many women are also involved because they know that they can earn an income if they invest and trade it. Most of them are from the third world country where the state of living is poor.